111310121 has 8 divisors (see below), whose sum is σ = 122796744. Its totient is φ = 100241280.

The previous prime is 111310117. The next prime is 111310139. The reversal of 111310121 is 121013111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15054400 + 96255721 = 3880^2 + 9811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111310121 - 2² = 111310117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111310021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103886 + ... + 104951.

It is an arithmetic number, because the mean of its divisors is an integer number (15349593).

Almost surely, 2^111310121 is an apocalyptic number.

It is an amenable number.

111310121 is a deficient number, since it is larger than the sum of its proper divisors (11486623).

111310121 is a wasteful number, since it uses less digits than its factorization.

111310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208891.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111310121 is about 10550.3611786517. The cubic root of 111310121 is about 481.0367075056.

Adding to 111310121 its reverse (121013111), we get a palindrome (232323232).

The spelling of 111310121 in words is "one hundred eleven million, three hundred ten thousand, one hundred twenty-one".